Not being satisfied with the wrinkles that were left in the back edges of the headliner after my amateur installation a year or so ago, I took the car out for a 70-mile round trip drive today, to a long-time upholsterer I have used for other work.
He's been doing this stuff for 45 years and he still says he's learning new methods every day. After about an hour or so of tugging, heating and massaging, all the wrinkles are gone. He said one of the mistakes people tend to make is not to trim away enough of the fabric channel that holds the metal bows. If there is too much of the channel still attached to the headliner on the ends, it will cause bunching and wrinkles in the edges and corners.
All in all, he said he has seen a lot worse backyard jobs than mine, so I guess that was a compliment. [img]<<GRAEMLIN_URL>>/grin.gif[/img]
(P.S. I think it's time I cleaned the camera lens.)